Datasheet

PN512 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 5.2 — 16 June 2016
111352 18 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
7.4.1 Active communication mode
Active communication mode means both the initiator and the target are using their own
RF field to transmit data.
The contactless UART of PN512 and a dedicated host controller are required to handle
the NFCIP-1 protocol.
Note: Transfer Speeds above 424 kbit/s are not defined in the NFCIP-1 standard. The
PN512 supports these transfer speeds only with dedicated external circuits.
Fig 11. Active communication mode
Table 10. Communication overview for Active communication mode
Communication
direction
106 kbit/s 212 kbit/s 424 kbit/s 848 kbit/s 1.69 Mbit/s,
3.39 Mbit/s
Initiator  Target According to
ISO/IEC 14443A
100 % ASK,
Modified
Miller Coded
According to FeliCa, 8-30 %
ASK Manchester Coded
digital capability to handle
this communication
Target  Initiator
host
NFC INITIATOR
powered to
generate RF field
1. initiator starts communication at
selected transfer speed
Initial command
response
2. target answers at
the same transfer speed
host
NFC INITIATOR
powered for digital
processing
host
host
NFC TARGET
NFC TARGET
powered for
digital processing
powered to
generate RF field
001aan216